Hong Kong authorities have stepped up border health checks after the city reported its first human case of the potentially deadly H7N9 bird flu, officials said Thursday.

Extra health officials have been deployed to carry out random temperature checks at entry points to the southern Chinese city, which already have thermal imaging systems.

The health department has liaised with border officers in the neighbouring mainland China city of Shenzhen to stay alert for travellers and cross-border students with fever or other symptoms, a government spokesman told AFP.

Suspected cases of avian influenza would immediately be referred to public hospitals.

Inspections were being stepped up at all entry points including from Shenzhen.

Hong Kong on Monday announced that a 36-year-old Indonesian helper was its first human case of H7N9.

“She has a history of travelling to Shenzhen, buying a chicken, slaughtering and eating the chicken,” health minister Ko Wing-man said then.

Hong Kong has said that 17 people, mostly relatives of the employer of the domestic helper, will be quarantined.

More than 220 other people are under medical surveillance but not quarantined.